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Statistics

08/17/22

A political candidate has asked you to conduct a poll to determine what percentage of people support her.

A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 9% margin of error at a 90% confidence level, what size of... more

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Statistics

08/17/22

Express the confidence interval (79.7%,87.5%)(79.7%,87.5%) in the form of ˆp±Ep^±E.

Express the confidence interval (79.7%,87.5%)(79.7%,87.5%) in the form of ˆp±Ep^±E.% ±± %

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Statistics

08/17/22

Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 368 with 75 successes

Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 368 with 75 successes. Enter your answer as a tri-linear inequality using... more

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Statistics

08/17/22

Assume that a sample is used to estimate a population proportion p.

Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a sample of size 234 with 11% successes. Enter your answer as an open-interval (i.e.,... more

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Statistics

08/17/22

85 students at a college were asked whether they had completed their required English 101 course, and 67 students said "yes"

85 students at a college were asked whether they had completed their required English 101 course, and 67 students said "yes". Find the best point estimate for the proportion of students at the... more

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Statistics

08/17/22

Section 8.3:Confidence Intervals (Proportions)

We wish to estimate what percent of adult residents in a certain county are parents. Out of 100 adult residents sampled, 83 had kids. Based on this, construct a 90% confidence interval for the... more

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Statistics

08/17/22

In a recent poll, 490 people were asked if they liked dogs, and 75% said they did. Find the Margin of Error for this poll, at the 90% confidence level.

In a recent poll, 490 people were asked if they liked dogs, and 75% said they did. Find the Margin of Error for this poll, at the 90% confidence level. Give your answer to four decimal places if... more

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Statistics

08/17/22

Out of 400 people sampled, 344 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.

Out of 400 people sampled, 344 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.Use a 95% confidence level, and give your... more

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Statistics Biostatistics

08/15/22

How to extract coefficients corresponding to data from each time in a mixed effect model in R?

I am not good at statistics and might have a naive question. Any help is appreciated.Here is the simplified question: Patients received two different vaccines twice and we collected their blood... more

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Statistics

08/15/22

Statistics homework

A national study found that college students with jobs worked an average of 22 hours per week. The standard deviation is 9 hours. A college student with a job is selected at random. Find the... more

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Statistics Math Probability

08/14/22

Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

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Statistics Math Algebra 1 Algebra 2

08/14/22

Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

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Statistics

08/13/22

Anscombe's Quartet (1973)

A problem involving this dataset appeared recently in one of my student's assignments. You can try it too.1.) Google "Anscombe", "quartet", and "kaggle." This will lead you to a site where you... more

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Statistics Probability

08/13/22

I need some help with creating a contingency table.

A. A party mix of candy contains a blend of M&Ms, Reese's Pieces, and Skittles. The blend is 50% M&Ms, 30% Reese's Pieces, and 20% Skittles. M&Ms are 14% yellow, Reese's Pieces are 25%... more

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Statistics Math

08/13/22

I'm not sure how to approach these 2 problems.

1: A certain disease has an incidence rate of 0.5%. The false negative rate on a test for the disease is 5%; the false positive rate is 5%. Compute the probability that a person who tests positive... more

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Statistics Probability

08/13/22

1:Use the following probabilities to answer the question. Don't round; enter your answers as ratios

P(A)=0.4 , P(B)=0.65 , and P(A and B)=0.2P(B∣A)=______ P(notB∣A)= ________P(notB∣notA)= _________

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Statistics

08/13/22

1: Compute the probability that a person who tests positive actually has the disease. (You may find it useful to construct a probability contingency table.)

1: A certain disease has an incidence rate of 0.5%. The false negative rate on a test for the disease is 5%; the false positive rate is 5%. Compute the probability that a person who tests positive... more

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Statistics Math Algebra 2 Calculus

08/12/22

finance perpetuity question

Anne plans to retire at 65 and wants a perpetual monthly income of $4000 from then on. Knowing that market fluctuations happen, she invested in a fund that pays the Inflation Index + 6% per year to... more

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Statistics

08/12/22

Help Please! Find Sample test statistic and P-value

In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20 pounds. Suppose that last summer 71 out of a random sample of 86 guests did, in fact, catch... more

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Statistics

08/12/22

Help Please! Find Sample test statistic and P-value

In a fishing lodge brochure, the lodge advertises that 75% of its guests catch northern pike over 20 pounds. Suppose that last summer 71 out of a random sample of 86 guests did, in fact, catch... more

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Statistics Math Discrete Math Probability

08/10/22

Probability &statistics

News reports tell us that the average American is overweight. Many of us have tried to trim down to our weight when we finished high school or college. And, in fact, only 20% of adults say they do... more

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Statistics

08/09/22

Statistics HW Question!

What price do farmers get for their watermelon crops? In the third week of July, a random sample of 43 farming regions gave a sample mean of = $6.88 per 100 pounds of watermelon. Assume that 𝜎 is... more

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Statistics

08/07/22

Statistics Question

Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a... more

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Statistics

08/07/22

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal... more

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Statistics

08/06/22

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal... more

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A political candidate has asked you to conduct a poll to determine what percentage of people support her.

Express the confidence interval (79.7%,87.5%)(79.7%,87.5%) in the form of ˆp±Ep^±E.

Assume that a sample is used to estimate a population proportion p. Find the 80% confidence interval for a sample of size 368 with 75 successes

Assume that a sample is used to estimate a population proportion p.

85 students at a college were asked whether they had completed their required English 101 course, and 67 students said "yes"

Section 8.3:Confidence Intervals (Proportions)

In a recent poll, 490 people were asked if they liked dogs, and 75% said they did. Find the Margin of Error for this poll, at the 90% confidence level.

Out of 400 people sampled, 344 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.

How to extract coefficients corresponding to data from each time in a mixed effect model in R?

Statistics homework

Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

Assume that the events A and B satisfy P(A)=P(B)=P(B/A')=1/3 where A' is complement of A. What is P(A'UB)?

Anscombe's Quartet (1973)

I need some help with creating a contingency table.

I'm not sure how to approach these 2 problems.

1:Use the following probabilities to answer the question. Don't round; enter your answers as ratios

1: Compute the probability that a person who tests positive actually has the disease. (You may find it useful to construct a probability contingency table.)

finance perpetuity question

Help Please! Find Sample test statistic and P-value

Help Please! Find Sample test statistic and P-value

Probability &statistics

Statistics HW Question!

Statistics Question

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Enter a number. Round your answer to four decimal places.)

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